// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV }) // 使用当前云环境

exports.main = async (event, context) => {
  const wxContext = cloud.getWXContext();

  return await db.collection('user').where({
    _openid: wxContext.OPENID
  }).update({
    data: {
      lastReadAnnouncement: event.lastReadAnnouncement
    }
  });
};